diff --git a/flash.h b/flash.h
index ccb3665..a4822e8 100644
--- a/flash.h
+++ b/flash.h
@@ -79,7 +79,7 @@
 #define MSYSTEMS_MD2800   0x30	/* hmm -- both 0x30 */
 #define MSYSTEMS_MD2802   0x30	/* hmm -- both 0x30 */
 
-#define SM_ID		  0x40  /* SyncMOS ID */
+#define SYNCMOS_ID	  0x40  /* SyncMOS ID */
 #define S29C51001T	  0x01  /* SyncMOS S29C51001T/B */
 #define S29C51002T	  0x02  /* SyncMOS S29C51002T/B */
 #define S29C51004T	  0x03  /* SyncMOS S29C51004T/B */
diff --git a/flashchips.c b/flashchips.c
index c1ee4eb..5015209 100644
--- a/flashchips.c
+++ b/flashchips.c
@@ -114,13 +114,13 @@
 #endif
 	{"LHF00L04",	SHARP_ID,		SHARP_LHF00L04,		NULL, 1024, 64 * 1024,
 	 probe_lhf00l04, erase_lhf00l04,	write_lhf00l04,	NULL},
-	{"S29C51001T", 	SM_ID, 	S29C51001T,	NULL, 128, 128,
+	{"S29C51001T", 	SYNCMOS_ID, 	S29C51001T,	NULL, 128, 128,
 	 probe_jedec,	erase_chip_jedec, write_49f002, NULL},
-	{"S29C51002T", 	SM_ID, 	S29C51002T,	NULL, 256, 128,
+	{"S29C51002T", 	SYNCMOS_ID, 	S29C51002T,	NULL, 256, 128,
 	 probe_jedec,	erase_chip_jedec, write_49f002, NULL},
-	{"S29C51004T", 	SM_ID, 	S29C51004T,	NULL, 512, 128,
+	{"S29C51004T", 	SYNCMOS_ID, 	S29C51004T,	NULL, 512, 128,
 	 probe_jedec,	erase_chip_jedec, write_49f002, NULL},
-	{"S29C31004T", 	SM_ID, 	S29C31004T,	NULL, 512, 128,
+	{"S29C31004T", 	SYNCMOS_ID, 	S29C31004T,	NULL, 512, 128,
 	 probe_jedec,	erase_chip_jedec, write_49f002, NULL},
 	{NULL,}
 };